Normal and Diagonal Sudoku rules apply. Each row, column, 3x3 box and the negative diagonal (from top left to bottom right) contains each number from 1 to 9 exactly once.
The grey lines are palindromes: they are sequences of digits which read the same backward as forward (for example: 1374731).
The white dots represent a difference of 1 between two neighbouring cells. All possible white dots are indicated.
The puzzle is also available online.
Solution code: Column 4 and Column 5
on 29. January 2021, 12:26 by steelwool
Great puzzle, such a nice flow.
on 29. January 2021, 12:01 by EliasKar
Amazing puzzle, I loved the solving process! Thanks for sharing!
on 29. January 2021, 10:06 by Lisztes
Added sudoku tag.